Former Googlers Robby Stein and Kevin Palms have launched a new iOS app called Stamped. Stamped is backed by Google Ventures, among other investors, and allows users to check-in to locations in a very simple way. Instead of whether you didn’t like the location, thought it was just ‘meh’, or totally loved it, Stamped uses a five star only recommendation system. If you like something you simply ‘stamp’ it. But get this — you only get a limited number of stamps to use, and earn more as your friends like your recommendations.

Stamped joins other check-in and ranking apps like the new Oink, Foursquare, and more. The ability to rank only what you only enjoy seems like a very smart idea, and throwing in the limited number of rankings makes it even better. Like any social network it’s about where your friends are, but being backed by Google this app has the chances of taking off.

Stamped is currently available on the App Store for free. An Android version is also currently in development, and should hit the Android Market fairly soon. Check out a few more screenshots after the break.